#app {
    width: 600px;
    margin: 0 auto;
    position: relative;

    .wrap {
        width: 602px;
        box-sizing: border-box;
        overflow: hidden;

        ul {
            li {
                float: left;

                img {
                    width: 200px;
                    height: 150px;
                }
            }
        }
    }

    .seckill-wrap {
        position: relative;
        display: none;

        .shade {
            width: 602px;
            height: 100%;
            background-color: #fff;
            position: fixed;
            top: 0;
            opacity: 0.5;
        }

        .seckill {
            width: 300px;
            height: 200px;
            position: fixed;
            top: 50px;
            left: 480px;
        }

        span {
            width: 30px;
            height: 20px;
            background-color: red;
            display: block;
            position: fixed;
            top: 50px;
            left: 750px;
            text-align: center;
            line-height: 20px;

            cursor: pointer;
        }
    }
}